Sienna Miller to play sous chef in "Adam Jones"

The 32-year-old actress is to take on the role of an assistant chef in the upcoming film, alongside Bradley Cooper, the Daily Mail newspaper reports.

Cooper will play the title character, a genius cook who returns to London to revive his career and attempt to win a third Michelin star after a period of detoxifying away from the kitchen.

Steven Knight wrote the script for the film - which was originally titled 'Chef' - and filming is to begin in London under the direction of John Wells in the next few weeks.

The majority of the cast - which also includes Emma Thompson, Daniel Bruhl and Jamie Dornan - spent a day with top chef Marcus Wareing at his two Michelin-starred Marcus restaurant at the Berkeley hotel in Knightsbridge, London in preparation for their upcoming roles.

Miller - who has been shooting the untitled Whitey Bulger biopic with Johnny Depp, in which she must age from 28 to 76-years-old - practiced her chopping skills and studied the way in which Wareing and his colleagues worked during the study session.

'Adam Jones' will act as a reunion for Cooper and Miller as they recently wrapped on Clint Eastwood's 'American Sniper' in which Cooper plays Navy SEAL Chris Kyle while Miller plays his wife Taya Renae Kyle.

The film was adapted from Kyle's book 'American Sniper: The Autobiography of the Most Lethal Sniper in US Military History'.